Base97

base97 is a free online toolkit that handles everyday file tasks — compressing images, converting formats, creating PDFs, and editing audio — entirely inside your browser. What makes base97 different is simple: your files never leave your device. There is no server upload, no account, no sign-up, and no processing history stored anywhere. Every tool runs on local browser technology (Canvas, Web Audio, WebAssembly and Web Workers), which means faster results and genuine privacy by design, not just by promise. What you can do with base97: 🖼 Image Tools (14 tools) Image Compressor — batch-compress up to 30 JPG/PNG/WebP images with quality and size controls, then download individually or as a ZIP. Compress Image to 100 KB — hit exact size limits for application forms and uploads, with smart quality and dimension search. Image Resizer, Crop, Rotate & Flip — precise pixel-level editing with live previews and side-by-side comparison. Format converters — HEIC to JPG, WebP to JPG, PNG to JPG, JPG to PNG, AVIF to JPG — batch support included. Blur Image & Watermark Image — protect sensitive areas or brand your work with text/logo watermarks. Image to PDF — combine up to 30 images into a polished PDF with page size, margin and layout control. 📄 PDF Tools (6 tools) Convert Word, Excel, PowerPoint, TXT, RTF and Markdown files into clean, previewable PDFs — with page-range selection, paper size, margins and resolution controls, all without uploading a single byte. 🎧 Audio Tools (2 tools) Audio Cutter — trim audio on an interactive waveform with precise timecodes, fade-in/out and MP3/WAV export. Merge Audio — join up to 10 clips with silent gaps or smooth crossfades, volume control per clip, and MP3/WAV output. base97 is also honest about what it can't do. Every tool page clearly lists its real limits — no inflated claims, no fake "AI-powered" badges. What you see is what actually works, verified in code. Small tools. Big possibilities. Try it at https://base97.com